chore(deps-dev): bump cssnano from 7.1.5 to 7.1.7 (#982)

Bumps [cssnano](https://github.com/cssnano/cssnano) from 7.1.5 to 7.1.7.
- [Release notes](https://github.com/cssnano/cssnano/releases)
- [Commits](https://github.com/cssnano/cssnano/compare/cssnano@7.1.5...cssnano@7.1.7)

---
updated-dependencies:
- dependency-name: cssnano
  dependency-version: 7.1.7
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]